Chopped OC-2, almost no sound, non-madbean project

[diablochris6]

I found a schematic of a chopped Boss OC-2 (only one octave down) and made an Eagle layout based off of a couple that I have seen around the web. When I plug it in, I get almost no sound. I can barely hear the guitar if I max out the volume of my amp, and even then, the amp noise almost drowns it out. Here is the schematic and pcb layout that I used.

(There is a ground plane that I didn't have show up for the sake of picture clarity)

IC Voltages:

TL074
1. 8.69
2. 1.85
3. 2.81
4. 9.6
5. 4.77
6. 7.66
7. 7.65
8. 7.53
9. 7.58
10. 4.55
11. 0
12. 5.16
13. 8.7
14. 8.7

LM324
1. 8.35
2. 7.98
3. 8.43
4. 9.6
5. 8.16
6. 7.99
7. 8.36
8. 8.36
9. 7.9
10. 8.15
11. 0
12. 7.9
13. 8.42
14. 0

CD4013
1. 0
2. 9.6
3. 0
4. 0
5. 9.6
6. 0
7. 0
8. 0
9. 0
10. 8.18
11. 0
12. 9.6
13. 0
14. 9.6

J201
G. 3.24
S. 3.96
D. 3.71

2N3904
C. 9.6
B. 7.55
E. 7.28

Pins 2 and 3 look suspect; I used a tantalum cap for C1, maybe I put it in the wrong way? What looks really odd is the 0V on pin 14 of the LM324. Any help is appreciated.

[wgc]

Only took a very quick look but I think you're missing some connections to ground, esp cd4013.   Try using a signal tracer and you should find the problem pretty quick.

[diablochris6]

Everything should be grounded fine; I have a ground plane that isn't shown on the pcb layout to make it easy to read. Pins 1 and 12 of the 4013 don't wire up to anything. One thing that I noticed was that pins 2 and 3 of the TL074 need to be switched in the schematic. Whoops! I will switch those out and see if that fixes the problem first.

[wgc]

Cool, didn't see your note about the ground plane earlier

Good luck!

[diablochris6]

After doing some more research, it looks like my IC layouts are fine. My input cap was facing the wrong way, so I turned it around. Still no luck! The clean signal comes in a little better, but there is a significant drop-off in volume and still no octave down. The voltages on my ICs are about the same as in the first post. Pin 14 of the LM324 is still confusing me with its reading of 0v. Looking around at different iterations of this circuit, sometimes I see R2, R7, D1, and the drain of J201 hooked up to the VA pad. Could that be a potential issue?

Also, I accidentally crunched up my J201 while dismantling, so I will have to get another one on top of the problem I already have. Has anybody attempted this circuit before? I am interested in how the 4013 actually works. I understand that it is a dual flip-flop and have a basic knowledge of how that works, but I can't wrap my head around what happens with the way the pins are linked up in this circuit.

[diablochris6]

Another stray observation is that some schematics have the clock of one side of the 4013 (pin 3) linked to the Q of the other side of the IC (pin 13), and others have pin 3 linked to Q naught (pin 12). I noticed that the Lowrider schematic has the second scenario, but there are supposedly functional OC-2 schematics with the first scenario, as well as my layout. Would this be a problem in creating the octave down sound?

Sorry if there are too many questions and observations; I want to get my pedal operational AND understand how the circuit works a little better.